Features: This 3 piece spherical rotary burr set features universally 5/8"-11 threads for direct attachment to 4.5" and 5" angled grinders, eliminating the need for adapters and ensuring vibrations less operations at high speeds. Crafted from carbon steel, these burrs maintain sharpness during extended use, withstand up to 12,000RPM, and offer aggressive 360 degree cutting for efficient materials removal. Ideal for woodworkers, carvers, and DIYer enthusiasts seeking professional tools for detailed sculpting and shaping projects with reliabled performances. Perfect for wood carving applications such as hollowing, contouring, and creating bowls, sculptures, or intricate curves in both dry and wet environments, thanks to the graduated sizes for progressive detailing. The spherical design enables seamless transitioning from coarse to fine finishes, delivering smooth surfaces and precise results in all woodworking tasks. Specifications: Component:Carbon Steel Size:Approx.10.9x3.8cm/4.3x1.5inch Size:Approx.10.4x3cm/4.1x1.2inch Size:Approx.10.1x2.54cm/4x1inch Color:Black Package Includes: 3 Pieces Spherical Rotary Burrs note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.